Initialization Requirements

However, when the 21555 samples l_stat high once the INS_STAT bit is cleared, this indicates that the ejector handle has been opened. This is interpreted as a removal event, and the 21555 enters the Signal Removal state instead. The same is true when the 21555 samples l_stat high while in the Normal Operation state.

When the 21555 enters the Signal Removal state, the REM_STAT bit is set and p_enum_l is asserted to indicate that a removal request is being made. Since the card is not yet ready for removal, the 21555 drives l_stat low in this state to force the LED off. When desired, the LED can be turned on by setting the LOO bit. Clearing the LOO bit causes the 21555 to drive l_stat low in this state.

After the software determines that the card is quiesced, or no longer performing or scheduling transactions, the host clears the REM_STAT bit. the 21555 deasserts p_enum_l and stops driving l_stat low. When the LOO bit is set, the 21555 continues to drive l_stat high. As long as the ejector handle stays open (l_stat sampled high), the LED will be on, indicating that it is OK to remove the card. The 21555 is now in the Removal OK state.

When l_stat is sampled low either upon clearing of REM_STAT, or anytime during the Removal OK state, this indicates that the ejector handle has been closed and the card is reseated. The 21555 enters the Signal Insertion state, setting the INS_STAT bit and asserting p_enum_l. Since no local state has been lost, serial preload and Primary Lockout Reset Value is not performed.

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21555 specifications

The Intel 21555 is a prominent microprocessor developed by Intel, designed to cater to a variety of computing needs. This processor marks a significant step forward in Intel's lineup and underscores the company's commitment to advancing technology in personal computing, enterprise solutions, and beyond.

One of the standout features of the Intel 21555 is its advanced architecture. It utilizes a multi-core design, enabling improved performance through parallel processing. This architecture allows multiple applications to run seamlessly without a decline in speed. The cores are built on a cutting-edge manufacturing process that enhances energy efficiency while maintaining high clock speeds.

The Intel 21555 supports a wide range of technologies, including Intel Turbo Boost, which enables dynamic adjustments to the processor’s performance based on workload demands. This feature allows the processor to accelerate its speed during intensive tasks, providing users with a responsive experience when it matters the most.

Another key characteristic of the Intel 21555 is its support for integrated graphics. With Intel UHD Graphics technology, users can enjoy enhanced visuals for everyday tasks such as video playback, web browsing, and light gaming. This eliminates the need for a separate graphics card for many users, particularly in home office or light gaming scenarios.

Security is a significant focus in the design of the Intel 21555. It includes built-in hardware-based security features like Intel Trusted Execution Technology and Secure Boot. These features help protect against various types of threats, ensuring that user data remains secure from malicious attacks.

The Intel 21555 is also optimized for use with Intel's platform technologies, including Intel Optane memory and Intel Rapid Storage Technology. These technologies work together to deliver faster boot times and improved system responsiveness, making computing more efficient for users.

Furthermore, the Intel 21555 is designed to support virtualization technologies, allowing multiple operating systems to run concurrently without compromising performance. This is particularly useful for developers and businesses that rely on virtualization for testing and development environments.

In summary, the Intel 21555 is a powerful and versatile processor that reflects Intel's ongoing innovation in the computing space. With its multi-core architecture, enhanced graphics capabilities, strong security features, and advanced technologies, it stands out as an excellent choice for a wide range of applications, serving both casual users and professionals alike.
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